Integrated Management of all Historic, Operational and Future Decommissioning Solid ILW at Dounreay

摘要

This paper describes major components of the Dounreay Site Restoration Plan, DSRP to deal with the site's solid intermediate level waste, ILW legacy. Historic solid ILW exists in the Shaft (disposals between 1959 and 1977), the Wet Silo (operated between 1973 and 1998), and in operating engineered drummed storage. Significant further arisings are expected from future operations, post-operations clean out and decommissioning through to the completion of site restoration, expected to be complete by about 2060. The raw waste is in many solid forms and also incorporates sludge, some fissile material and hazardous chemical components. The aim of the Solid ILW Project is to treat and condition all this waste to make it passively safe and in a form which can be stored for a substantial period, and then transported to the planned U.K. national deep repository for ILW disposal. The Solid ILW Project involves the construction of head works for waste retrieval operations at the Shaft and Wet Silo, a Waste Treatment Plant and a Conditioned Waste Store to hold the conditioned waste until the disposal facilities become available. In addition, there are infrastructure activities to enable the new construction: contaminated ground remediation, existing building demolition, underground and overground services diversion, sea cliff stabilisation, and groundwater isolation at the Shaft. The Solid ILW Project involves many sub-projects and therefore the challenge is to integrate the whole to ensure that it is: (1) managed effectively and safely$ (2) undertaken in a way that is environmentally friendly$ (3) clearly value-for-money$ (4) carried out in a way that is publicly acceptable$ and, (5) delivered on the time-scales the United Kingdom Atomic Energy Authority, U.K.A.E.A. has committed itself to in DSRP.